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ELU AH K. JEN NER, OF HEALDSBURG, CALIFORNIA.

Letters Patent No. 96,438, dated November 2, 186i).

IMPRovED METHOD or' UNITgING ARTIFICIAL TEETH oN RUBBSR BASES To METALLIo y PLATES.

*The Schedule referr'ed to in these Letters Patent am] making part o1' ther same.

To all lwhom it may concern:

Be it known that I, ELIJAH' K. J ENNER, ot Healdsburg, county oi'Sonoma, State `ot` California., have. invented a Method of Joining Artificial Teeth on Vulcanite Bases to Metallic Plates; and I do hereby declare the tbllowing description and accompanying drawings are sutticient to enable any person skilled in the art or science to which it most' nearly appertains, to make and use my said invention or improvement without further invention `or experiment. v

My invention relates to an ilnproved construction of artificial teeth, whereby durability, st-renpth, aud cc'onomy are combined with a proper degree of lightness, thus providing a very desirable and usei'ul combination. when applied to theporpose above mentioned.

To accomplish this, l set y the gum-work in a vulcanite base, and then, by employing two t-hinmetal plates, Ibuild upon the hasethe plate which comes in contact with the. palate of' the mouth, in such a manner that the two are firmly joined together.

To more fully illustrate and explain my invention, reference is had to the accompanying drawings, forming apart ot' this specification, of which- Figure 1 is a sectional View of tire upper plate.

Fgnretl is a perspective-view of the lower plate.

A, in the thawing, shows the teeth and gum-work of an upper set of artificial teeth, placed npon'or embedded in a vuleanite base, B, forming merely a bed or foundation for holding the .teeth and gum-work, and its longitudinal extent aud'ihrm of' outline must ot' course be adapted to the requirements ot' each particular case. J

Thepiate O is composed of two thin mctalplates,

al of.,

The lower plate, a', is first swaged to the proper formorimpression of the mouth, and the vacuum cavity 1) formed in it at the same time.

The upper plate, ll, is also provided with the propel' impression'of-the palate of the mouth, and vhas itsV outer edge tui-ned up, so as to encircle the gums of the wearer.

In the plate-aya portion is cut away around the-- base ot' the` teeth, while the plate a rises vertically inside the gum-work and base.

A narrow strip oi metal, b, is then placed around the outside of' the rubber, and its upper edge brazed to the upper or raised edge ot the plate (aand filed rounding, so as to prevent it from hurting the mouth.

Vuloanized rubber is then introduced between 'the two thin plates until the space between the plates and gum work is entirely filled'.

The rubber so employed is then subjected to the usual process ot' hardening by heat, and the edges of the two plates are br'azcd or soldered at all places' where they come in contact, and tiled as abovedescribed'. f

The. upper edge ofthe plate a. might be turned over instead of uniting the separate strip b, but lprefer the mode described, as greater strength is obtained; besides, the proper eurvatures and ind'entul'es can be made by filing when the ends are united; but if' it is turned crei-,filing it would weaken, and frequently separato the'two.

The lower set is constructed much inthe same manner, always, instead oi' turning over thel edges to f'orm recesses into which to lu'ess the rubber, uniting' the two edges by brazing or soldering, for the reason above set fbrth.

A small wire, c, shown in fig. 2', maybe attached to the plate, near the widest part, in order to more` securely confine the rubber, and unite it with the metal plates.

.The advantages of' thus uniting rubber teeth toyr metal plates are obvious.

The workmanship can be donc so as to present artificial teeth of great beauty, while their durability will be much greater than as ordinarily constructed.

Havim.r tlms described my invention,

W hat I claim, and desire to secure by Letters Patent, is-

The combination eta-limited -vuleauite base, B, holding the teeth and gum-work, with two metallic plates, a, and a', substantially as shown and described."

In witness whereof', I have hereunto set my' hand and seal.

\ g -ELIJAH K. J'ENNER. [L. `s.]

Witncssesi WILLIAM STAMFORTH, .J L. BooNE. 

